133 lines
4.4 KiB
C
133 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2016 Oracle. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
#ifndef _RDS_IB_MR_H
|
|
#define _RDS_IB_MR_H
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include "rds.h"
|
|
#include "ib.h"
|
|
|
|
#define RDS_MR_1M_POOL_SIZE (8192 / 2)
|
|
#define RDS_MR_1M_MSG_SIZE 256
|
|
#define RDS_MR_8K_MSG_SIZE 2
|
|
#define RDS_MR_8K_SCALE (256 / (RDS_MR_8K_MSG_SIZE + 1))
|
|
#define RDS_MR_8K_POOL_SIZE (RDS_MR_8K_SCALE * (8192 / 2))
|
|
|
|
enum rds_ib_fr_state {
|
|
FRMR_IS_FREE, /* mr invalidated & ready for use */
|
|
FRMR_IS_INUSE, /* mr is in use or used & can be invalidated */
|
|
FRMR_IS_STALE, /* Stale MR and needs to be dropped */
|
|
};
|
|
|
|
struct rds_ib_frmr {
|
|
struct ib_mr *mr;
|
|
enum rds_ib_fr_state fr_state;
|
|
bool fr_inv;
|
|
struct ib_send_wr fr_wr;
|
|
unsigned int dma_npages;
|
|
unsigned int sg_byte_len;
|
|
};
|
|
|
|
/* This is stored as mr->r_trans_private. */
|
|
struct rds_ib_mr {
|
|
struct rds_ib_device *device;
|
|
struct rds_ib_mr_pool *pool;
|
|
struct rds_ib_connection *ic;
|
|
|
|
struct llist_node llnode;
|
|
|
|
/* unmap_list is for freeing */
|
|
struct list_head unmap_list;
|
|
unsigned int remap_count;
|
|
|
|
struct scatterlist *sg;
|
|
unsigned int sg_len;
|
|
int sg_dma_len;
|
|
|
|
union {
|
|
struct rds_ib_frmr frmr;
|
|
} u;
|
|
};
|
|
|
|
/* Our own little MR pool */
|
|
struct rds_ib_mr_pool {
|
|
unsigned int pool_type;
|
|
struct mutex flush_lock; /* serialize fmr invalidate */
|
|
struct delayed_work flush_worker; /* flush worker */
|
|
|
|
atomic_t item_count; /* total # of MRs */
|
|
atomic_t dirty_count; /* # dirty of MRs */
|
|
|
|
struct llist_head drop_list; /* MRs not reached max_maps */
|
|
struct llist_head free_list; /* unused MRs */
|
|
struct llist_head clean_list; /* unused & unmapped MRs */
|
|
wait_queue_head_t flush_wait;
|
|
|
|
atomic_t free_pinned; /* memory pinned by free MRs */
|
|
unsigned long max_items;
|
|
unsigned long max_items_soft;
|
|
unsigned long max_free_pinned;
|
|
unsigned int max_pages;
|
|
};
|
|
|
|
extern struct workqueue_struct *rds_ib_mr_wq;
|
|
extern bool prefer_frmr;
|
|
|
|
struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev,
|
|
int npages);
|
|
void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
|
|
struct rds_info_rdma_connection *iinfo);
|
|
void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
|
|
void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
|
|
struct rds_sock *rs, u32 *key_ret,
|
|
struct rds_connection *conn);
|
|
void rds_ib_sync_mr(void *trans_private, int dir);
|
|
void rds_ib_free_mr(void *trans_private, int invalidate);
|
|
void rds_ib_flush_mrs(void);
|
|
int rds_ib_mr_init(void);
|
|
void rds_ib_mr_exit(void);
|
|
|
|
void __rds_ib_teardown_mr(struct rds_ib_mr *);
|
|
void rds_ib_teardown_mr(struct rds_ib_mr *);
|
|
struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *);
|
|
int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **);
|
|
struct rds_ib_mr *rds_ib_try_reuse_ibmr(struct rds_ib_mr_pool *);
|
|
struct rds_ib_mr *rds_ib_reg_frmr(struct rds_ib_device *rds_ibdev,
|
|
struct rds_ib_connection *ic,
|
|
struct scatterlist *sg,
|
|
unsigned long nents, u32 *key);
|
|
void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed,
|
|
unsigned long *unpinned, unsigned int goal);
|
|
void rds_ib_free_frmr_list(struct rds_ib_mr *);
|
|
#endif
|